Broom



G. W. MANNING.

BROOM. H'LED MAR Patented Mar. 14, 1922.

Y barren STATES 'PATE enonen w. MANNING, or CHICAGO, ILLINOIS.

To all whom it may concern: 7

Be it known that I, GEORGEIW. MANNING, a citizen of the Unitedstates,residing at Chicago, in the county of Cook and State of Illinois, haveinvented. certain new and useful Improvements in Brooms, of which thefollowing is a specification. I

My .invention relates to -brooms. and has for its primary object theprovision of improved means whereby a body of bristles and a handle forwielding the same may be held together. Other objects are the provisionof handle holding devices of great strength and whereby wear in thehandle may be taken up to prevent loosenessoi' the handle; the provisionof clampingplates having improved strengthening and bristle grippingelements whereby a body of bristles may be bound into a firm.mass; andthe provision of a spring for preventing loosening of a rotatable handleholding member.

Other objects and advantages of my invention will appear from thefollowing de scription taken in conjunction with the accompanyingdrawings which form a part of this specification and illustrate thepreferred embodiment of the invention.

. In the drawings-:1 I V Fig. l is a front elevation of a broomembodying my improvements, the upperpart of: the handle beingbrokenaway;

Fig. 2 is a section taken on line 2-2-of Fig. .l Fig- 3 is asectiontaken on line 3-3 of Fi 3 Fig. 4;is a section taken on line 44 of Fig.5is a iragmentary'side elevationof the broom shown in the precedingfigures,

this view being taken from theright hand side-of Fig. 1'. 1 r

A bodyv 10 of upstanding bristles of broom corn or other suitablematerial isbound togetherjinto' a firm mass at its upper endll bycompanionfront and rear clamping plates numbered 12 and '13respectively. A pair of opposed, semi-cylindrical handle holding shanks14c and 15 .rise respectively from the front andrear plates and define asocket for thehandle 16, the latter being shouldered at .17 to fit flushwith the shanks; The shanks are elongated' vertically. in order thatthey may'grasp the handle at upper and-lower mutation filed March21,1918; Serial No. 223,812).

. BROOM.

Specification of Letters Z Eatent. ate te g 14, 1922,;

Each. shank is integral with its clamping NT "QFFICE plate and both arepreferably formed of a sheetmetal stamping. Each shankis formed with alongitudinal stiffening, corrugation .18 and-With transverse stiffeningupper and lower corrugations 19 and 20 respectively which intersect theupper and lower extremities of the corrugation 18. verse corrugationspreferably extend from one longitudinal edge toat he other in each shankbut are spaced from the extremities ofthe shank. Oppositelyregisteringapertures are punched in the'corrug-ations 18 and the forward shank istcountersunkeabout this aperture to receive smoothly the screw head of.a. threaded. bolt '21 which passes These transthrough the handle 16,while the'rear shank has. a squared depression formed aboutit inthemetal to receive and prevent? rotation of a nut-22 threaded on the:bolt. The. bolt head. and .nut are positioned approximately at thelongitudinal and transverse centers of the respective shanksand thelatter are cambered on horizontal axes at these centers; that is, theyare given a, slight curve from top to bottomto cause theirjupper andlower extremities to exertgreater pressure against the handle thantheircentral. portions,. By means of thisconstruction. the

handle. is prevented from" pivoting in the' shanks about a horizontalaxis passing throughthe. bolt at right. angles ..to it, as"

would be the; case were the: centers of the shanks drawntightly againstthe wood of the handle. WVhen the handle becomes worn where. theextremities of the shanks bear on it, this. wear can be taken-up byrotating screw bolt-.21 in .nut- 22 to'close the slight sp'aceshowninFig. 2 between-the socketed cylindrical portion 230i the handle'andthe, central portions of the shanks. The corrugations-18 carrythe-tension of the bolt upwardly and downwardly along; the shanks;

and the transverse corrugationsll9 and 20 carrythis pressure around thehandle, thereby preventing the edges of the, shanks from curling awayfrom the handle. V

The clamping plates areheld against the body of bristles by a central"clinch pin2 i, intermediate pins25, andend pins 26. The

Y centralpin is formed of springjmetaljand has itstip 27 bent backthrough plate a position above and spaced from its body portion, thistip, before insertion of the handle, occupying the position shown by theup-tilted dotted linesin Fig. 2. The stampings comprising the plates andshanks are so formed that the lower extremities of the shanks approacheach'other to form a downwardly tapering socket, the diameter of thissocket, just above tip 27, being slightly less than the diameter'of thelower end of the handle. In setting. the handle, as it is wedged'into'the shanks, it strikes the upi tilted tip 27 and forces this downinto the dle just below shoulder 17.

full line position of Fig. 2; bolt 21 is now driven through the shanksand handle and threaded into nut 22, drawing the upper ends of theshanks tightly against the han- Should the handle wear loose in theshanks before bolt 21 is screwed up to'tighten their hold, the boltcannever turn out of the nut because of the constant upward pressure of tip27 communicated through the handle'to the bolt and through the bolt tothe upper edges of-the shank apertures.

As best seen in Figs. 1 and 4c, the clamping plates 12 and 13 have theirupper and lower longitudinal edges inbent to form strengthening andbristle gripping edge members 28 and 29. Between these longitudinaledges, and substantiallyparalleling them, are medial strengthening andbristle gripping members comprising in each plate an inturnedcorrugation 30. These corrugations 30 are discontinuous to permit theformation between their spaced ends of centrally apertured circularcorrugations 31 against which extend slightly above the upper edgeflanges 28'and protected by a cover 35 which is of an inverted U-shapein cross section. Each cover has its inner end 36 wedged between thelower end of the handle and the side of a recess 37' formed in the firmmass 11 for reception of the handle; while the outer end I of each coveris positioned between the overlapped ears 34 of the front and rearclamping plates. 'By means of a horizontal cor rugation'38 formed inboth earsand in the outer end of each cover, the covers are securedbetween the ears. These corrugations 38 are inturned and positionedabove the end clinch pins 26 so that those bristles lying between theend pins will be forced against the outer side of the pin at each sideof the broom and bent over the pin, being thereby held securely againstloosening.

In the manufacture of the lighter grades of brooms the fineness of thebristles used causes too great flexibility in the brushing action of thefinished article. To provide the requisite stiffness, I insert thick,sti'fi' bristles 39in thefirm mass 11 and extend them downwardly belowthe clamping plates to substantially the location of the custom.- arystitching 40 shown in Fig. 1.

By insertinga screw-driver in the head of bolt 21 the handle may beremoved by withdrawal of the bolt and used in a new broom.

I claim: 7

1. Ina broom, the combination with a body of bristles, of companionclamping plates therefor, a pair of opposed shanks formed one on eachplate and defining a handle socket, said shanks; tapering toward eachother at their junctions with the respective plates, a yieldable pinextendin through the plates and said body belowsai socket and having ayieldable portion disposed within the socket, and a handle wedged intothe tapered portion of the socket and bearing on the yieldable portionof said pin.

2. In a broom, the combination with a body of bristles, of companionclamping plates therefor, a pair of opposed shanks formed one on eachplate and defining a handle socket, a pin ofspring metal binding theplates against said body and having its tip bent back above and spacedfrom its body portion so that said tip extends into-the bottom of thesocket, a handle in the socket and bearing on said tip, and a boltpassing I through the handle andshanks and holding the shanks againstthe handle; said tip being compressed, whereby through the handle andagainst the bolt to prevent rotation of the bolt.

it exerts pressure 3. In a broom, the combination with a.

body of bristles, of a clamp therefor, a handle socket carried by theclamp, a handle in the socket, a bolt passing through the handle andsocket, and a pm of spring metal mounted in the clamp and exertingpressure through the handle against the bolt to pre vent rotation of thebolt.

4. In a broom, the combination with companion bristle clamping plates,of a body of bristles bound therein, a pin traversing said body and theplates near corresponding ends of the plates, overlapped end ears fixedone on eachplate and binding a portion of said bristles against theouter side of the pin, 1

and interfitting strengthening corrugations formed one in each ear abovethe pin and in turned to bind said portion of the bristles over the pin.

5. In a broom, the combination with a its inner end inserted between thehandle handle, a body of bristles, and clamping eleand the side of saidrecess and its outer end ments binding the bristles into a firm mass,positioned between said ears, and interfit- 10 there being a handlereceiving recess formed ting strengthening and locking corrugations 5centrally in the top of said mass; of overformed in said ears and theouter ends of lapped end ears formed on said elements, the covers. 7covers for the top of the bristles each having GEORGE W, MANN ING

